O positive or O negative.
O negative can be given to a person with any bloodtype, but if possible it is better for a person requiring transfusion to be given blood matching their own bloodtype.
On the contrary, bloodtype AB is not rare. Bloodtype AB is a great blood type since it can recieve blood from both bloodtypes A and B. The rarest bloodtype there is, is bloodtype O.
The father's blood type must be O, Rh genotype can't be determined.
He is bloodtype A.
The imaginary bloodtype
Any bloodtype is just as easy to donate as any other.
AB , the rarest bloodtype.
his bloodtype is AB
blood type B
The baby could have almost any bloodtype except for O.
The blood type of Spock is T-Negative. (which is very unlikely, even for a Vulcan.) Turns out Spock and Sarek (Spock's father) share the same bloodtype.
Yes there are both a B- and a B+ blood type. This simply means that people are part of the B group bloodtype, but they have either the rh + or - factor in their blood as well.